WinDump is the Windows version of tcpdump, the command
line network analyzer for UNIX. WinDump is fully
compatible with tcpdump and can be used to watch, diagnose and save to
disk network traffic according to various complex
rules. It can run under Windows 95, 98, ME, NT, 2000, XP, 2003 and Vista.
WinDump captures using the WinPcap
library and drivers,
which are freely downloadable
from the WinPcap.org website. WinDump supports 802.11b/g wireless
capture and troubleshooting through the
Technologies AirPcap adapter.
WinDump is free and is released under a BSD-style licence.